package com.rem.designPattern.facade外观;

/**
 * @author Rem
 * @date 2022-11-17
 */
public class Projector {
    private static final Projector PROJECTOR = new Projector();

    public static Projector getInstance() {
        return PROJECTOR;
    }

    public void on() {
        System.out.println("打开投影仪...");
    }

    public void off() {
        System.out.println("关闭投影仪...");
    }
}